Guides
Plain-language explainers on FSRS, spaced repetition, and vocabulary flashcards — the science behind effective study, independent of any one app.
FSRS (Free Spaced Repetition Scheduler) is a modern algorithm that predicts when you will forget a flashcard and schedules the next review for that moment.
Read guideSpread reviews over time instead of cramming — the most replicated finding in learning science, now automated by algorithms like FSRS.
Read guideTerm on one side, definition on the other — active recall that turns word lists into long-term vocabulary.
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